Finding the Third Proportional to 8,690,146 and 13,147,068

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,146 : 13,147,068 = 13,147,068 : x
2. Step 2: Convert to fraction form
   8,690,146/13,147,068 = 13,147,068/x
3. Step 3: Cross multiply
   8,690,146x = 13,147,068 × 13,147,068
4. Step 4: Simplify right side
   8,690,146x = 172,845,396,996,624
5. Step 5: Solve for x
   x = 172,845,396,996,624/8,690,146
6. Step 6: Final answer
   x = 19,889,815.08